RE10TC Temperature Control Module Operating manual

Measuring of

Measuring of temperatures Functions Buffer Memory Address (decimal) 2.2.3 Alarms 26 Flags: sensor fault 270 to 279 Four alarms (two upper and two lower limits) can be set for each controller. Each limit can be activated or deactivated by the PLC. When the monitoring is switched on, flags in the buffer memory are used to show if a certain limit or warning has been reached. The values are entered as relative values. The limit is worked out from the set value of the respective heating zone ± the relative values. With this type of setting, the tolerance range remains constant even when the set values are changed. In the following figure, the upper warning value is set to be 10 K above the set value. If the actual value is 15 K higher than the setpoint, the upper limit is reached. The alarm from the lower warning value should be go on when the actual value ist 5 K below the setpoint. When the actual value is 15 K smaller than the setpoint, the alarm for the lower limit is rised. Real value Upper limit = 150 (�T= 15K) Upper warning = 100 (�T= 10K) Lower warning = 50 (�T= 5K) Lower limit = 100 (�T= 10K) Alarms: Upper limit Upper warning Lower warning Lower limit °C 210 205 195 190 185 Abb. 2-2: Limits and warnings Name Description Duty cycle when sensor fault is detected Indication of a faulted temperature sensor Setting of a fixed duty cycle for the outputs in case of sensor fault Upper limit Upper warning Set value Lower warning Lower limit TC00028C The reporting of the lower warning value or limit after switching on is suppressed until the lower values are crossed once. During this period, only the upper warning value and limit alarm are active. This feature is activated after the power supply to the RE10TC has been switched on (buffer 2-6 MITSUBISHI ELECTRIC t Real value/ Set value Real values Set values 280 to 289 Delay for sensor monitoring On delay for sensor monitoring Set values Tab. 2-5: Buffer memory areas for monitoring of the temperature sensors

Functions Measuring of temperatures memory address #325 = 0). If buffer memory address #325 is set to a value of “1“, then the lower limits are immediately activated (see 3.3.13). Buffer Memory Address (decimal) 22 to 25 Alarm flags Name Description MITSUBISHI ELECTRIC 2 - 7 Indication, whether a warning value or limit is reached Real value/ Set value Real value 27 Status flags of the RE10TC Bit 1 is set when the lower alarms are active Real value 140 to 149 Lower limits Set values for the lower limits Set values 150 to 159 Upper limits Set values for the upper limits Set values 160 to 169 Lower warnings Set values for the lower warnings Set values 170 to 179 Upper warnings Set values for the upper warnings Set values 325 342 to 345 Alarms ON/OFF Monitoring of the lower limits and lower warnings Tab. 2-6: Buffer memory areas for alarms Selection, whether the lower warnings and lower alarms must be exceeded once or not to activate these alarms The monitoring of every alarm can be switched ON or OFF Set value Set values